custody there are situations now where a lot of people are saying you don't need to read the miranda rights right away. if is strong suspect is picked up, or could provide significant information, i think that addition could be discussed between doj, fbi, the white house -- >> presumably as the fbi is going through this, they are looking to make sure no secondary attacks is the first priority, and then to make sure they maintain the possibility of getting ultimately a criminal conviction. >> absolutely. >> joining us now is an eyewitness, greg, ran the marathon and was in the medical tent with the explosions happened. he joins us by phone from boston. greg, zwrieb describe what you were doing in the medical tent at what time and what the scene there was like. >> yeah, the first thing to share, this was wave three, so i was a charity runner for the alzheim alzheimer's association. we started at 10:40 a.m., and i finished my first under four. hi pushed pretty hard in mile 25 and 26, what that means i was winded and dizzy, i was ready to faint. as i crossed the finish line one i asked f